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>   The documentation sources are written in
   <I
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>DocBook</I
>, which is a markup language
   superficially similar to <ACRONYM
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>SGML</ACRONYM
>, which is
   essentially a language for describing other languages.  In what
   follows, the terms DocBook and <ACRONYM
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>  <SPAN
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> allows an author to specify the
   structure and content of a technical document without worrying
   about presentation details.  A document style defines how that
   content is rendered into one of several final forms.  DocBook is
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>   OASIS group</A
>.  The <A
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>   official DocBook site</A
> has good introductory and reference documentation and
   a complete O'Reilly book for your online reading pleasure.  The
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>   NewbieDoc Docbook Guide</A
> is very helpful for beginners.
   The <A
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>   FreeBSD Documentation Project</A
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